Hello everyone!

i can't figure these word problems!

this is not graded or anything, my pre-calc teacher handed htem out so we can pratice but he didn't give us the solutions or anything to show us how to od htem if we don't understand. SO i was wondering if any of u would like to take a "whack" at it, and show ur work so i can see how it was done it would be great. Thanks for your time. Here are some of them.....

Oh and if u care to share ur thinking techniques that would be helpful also so i can devlope better problem solving skills.

Code:
The sum of the lenghts of the three sides of a right triangle is 18 units.  
The sum of the squares of the lengths of the three sides is 128 units.  
What is the area of the triangle?
answers:
  A. 5   B. 8   C. 9  D. 18  E. 32
Code:
If the Product   3/2  x  4/3  x  5/4 x 6/5. ....a/b = 9
what is the sum of a and b?
answers:
A. 11  B. 13   C. 17  D. 35  E. 37
Code:
The sum of the positive square roots of two numbers is 5. 
 The two numbers also differ by 5.  
Waht is the smaller of the two numbers?
answers:
A.  0     B.  1   C.  4   D.  5  E. 9

Code:
The positive interger 4 can be represented as a sum of 1's or 2's in five ways.  
They are:  1+1+1+1, 1+1+2, 1+2+1, 2+1+1, and 2+2.  
In how many ways can the postive integer 5 be represnted as a sum of 1's or 2's?
answers:
A.  6   B.  7  C.  8  D.  9  E. 10

Code:
A cicular target with  radius of 12 inches is to have a 
cicular bull's-eye painkted in teh center, 
so that the area of bull's eye is 1% of the total area of the target.  
What should the radius of the bull's-eye be in inches?
answers:
A.   0.12  B.  1.2  C.   1/sqr(pie)   D.  12/sqr(145)   E.  0.0

Code:
A two-inch cube (2x2x2) of silver weights 3 pounds and is worth $200.  
How much is a trhee-inch cube of silver worth?
answers:
A. $300   B.  375  C. 450  D. 560  E. 675

Code:
Given that 2/3 of the members of a committee uses 
3/4 of the charis in a room, 
what is the least possible number of members on the committee?
answers:
A. 3   B. 6  C. 9  D. 12  E. 15

Code:
All the even numbers from 2 to 98 inclusive, 
except those ending in 0, are multiplied together. 
 What is the rightmost digit, that is, the untis digit, of the product?
answers:
A.  0   B.  2  C.  4  D. 6 E. 8



Thanks for your time.